allison



March 5, 1946. G. ALLlsoN 2,395,796

PROJECTR STAND ASSEMBLY Filed Dec. 24,11943 3 Sheets-Sheet 1 March 5, 1946. l L. G. ALLlsoN 2,395,795

PROJECTOR STAND ASSEMBLY Filed Dec; 24, 1943 I5 Sheets-Sheet 2' TH. THW l I lMarch 5, 1946. L. G. A|.|l.|soN n my 2,395,795

PROJECTOR STAND AS SEMBLY Filed Dec. 24, 1943 3 Sheets-Sheet 3 Patentel Mar. 5, 1946 'i 2 e@ mounting foretherzdeilies taeefnrovldes 111; the training 0f f adets f fQr airplane-@MS :andthemoton @tile-liteit maybe idesirableto protect-fen andthe motor .z1mege-unqnsreen tllepestionandtherzgular ,d relation @fthe triage-911th@ screw-@being under with@ theprgte he @end ,tege-i9;

the Control Qfthemtmmr- -,Suhanmagemey supportfierthegmeha'rimein-tlefh be used in depicting the` flight of an airplane, -1Thisre,s ults@naf sty turesuh that W showing the movement of a, surface vehicle, either or; in the third eigeV .--onJand oronwater, orxfor-illuetratng themove- Qscillatestheprqclgetlnjthe. :mentof a proj ectile'passing through. space. 1,5 al-relativemevementofthe,brglet ,Anobject of Vthis .v inyentongis` to provilea staigevithy-reepect; to lthekyraclzcti mountingfonafprojector, which mounting; allows second stage. The projecto forlahe movementoradiustment of theprojector j ,bracletV- lfqiindrgin; thet .in three planes; that maybe substantiglly normal ;IIlQOI in the egndJ-stgige T-toeachothen v20' 1`J -1;br@ 3361? in the .Qoldt #Another `.object-, 0f this-invention is tolprovide T-pneumatic or hydraulic control means :for acturating a f device having oscillatorymovement in .three planes.

Another object A of this invention. is to Y provide af-device that sremotelycontrolled, whichdevice @has movements l.in three planes respondingtopredetermined movements; at, acontrol station.

::Qther `lobjects;andeadvantages reside fin theeconstruction of.parts, the combinationv thereofgencl the mode of operation, as Will becomefmoreeapfparent from the followingdescrption.

-s-.Inlthe drawings,

Figure 1 is a side elevational.Viewoffthe mountfing device'ona projector. f

Figure 2 s an .end e1evation as- ;viewedyfrom the-right @Figure 1.

Figure 3 is a top plan view of the device `shown Figures 1 and .2. Before diecussinefthegeetelsv0f@ theftruture, etheprmiple 1 1D9n which thestrutllrei 15169.11- M endf! S integral: the; v.s-ttu@ted-will:be desribedablielfly- Thetruwre fwpai-rofesmalflerg wf elzvdes supprt'fr a proerfuhthatthe ismQunted-.on aime 1-M2121 er PYQJQQtQPfmaYibe091ltd 111. tlle Rllls felt eXtending through eapertures vin.

eht anglestoaehvther- This hes benza- 4 ydirected ears-,l.4 and fzmnlhedby monding three S @g vided witma pai anism, such that the first Steg Figure-1, vgsnppo ;threvdedlyenga movement with respect to the standard 24, and

oscillated by a mechanism that will now be described.

Near the base of the standard 24 is a second arm 44 integral` with the standard 24, which arm 4-4 supports a mounting bracket 46 'having attached thereto a pair of angular brackets 48 and 50 having journalled therein the end frame 52 of a cylinder 54 having a pair of fluid intake openings or passages 56 and 58, one in each end, which intake passages may be connected by flexible conduits to a remote control station. A piston rod 60 extends through the cylinder and has xedly attached thereto a piston, not shown, `within the cylinder. The piston rod is adjustably attached to a bifurcated coupling unit 62 pivotally attached to a bell crank lever 84 pivoted at 66 upon the standard 24. 'I'he other arm of the bell crank'lever 64 is pivotally attached to a link 68 connected through a bracket 10 to an arm 'l2 integral with the oscillatory bracket member 42.

1f a uid is admitted to the passage 56,'so as '25 to actuate the piston to the left, as viewed in Figure 1, the piston rod 60 will actuate the bell crank lever 64 in a. counterclockwise direction, as viewed in Figure 3, so as to rotate the oscillatory bracket member 42 in a counterclockwise direction, as viewed in Figure 2. If fluid is admitted tothe passage 58, the piston rod 60 will be actuated to the right, as viewed invFigurel 1, so asto oscillate the bell crank lever 64 in a clockwise direction, as Y viewed in Figure 3, to thereby rotate the oscillatory bracket member 42 in a as viewed in Figure 2.

The oscillatory bracket member 42 is integral with an arm 80 having mounted therein a pivot 8| pivotally supporting a bracket 62 mounted for oscillatory movement upon pivot 8| in a plane substantially normal to the axis of rotation of the oscillatory member 42. The mechanism for oscillating the bracket 82 will now be described. A

The arm '|2 at its remote end, as best seen in Figures 1 and 3, supports a bracket 90 having xedly attached thereto a pair of bracket plates 82 and 94. These bracket plates pivotally support clockwise direction a cylinder 96 provided with a piston rod |00 connected to a bifurcated couplingunit |02 pivotally attached to one end of a lever |04 having its opposite end pivotally attached at |06 to the arm 80. A link I0 is pivoted at ||2 to the lever |04 and pivotally attached at ||4 to the bracket 82. This structure is best seen in Figure 1. Fluid may be admitted to the cylinder 96 through the intake opening or passage ||6 or the intake opening or passage ||8 communicating with opposite ends of the cylinder 96. As may best be seen by referring to Figure 1, if iiuid is admitted through the passage H6, the piston rod |00 will be actuated to the rightfso as to oscillate the lever |04 in a counterclockwise direction about the pivot |06 and thereby oscillate the bracket 82 in a counterclockwise direction about the pivot 8|. If fluid is admitted through the passage |8, the bracket 82 will be cscillated in a clockwise direction.

The lower end |20 of th'e bracket 82, as viewed in Figure 1, provides a pivotal support for a will now be described.

The lower end |20 ofthe bracket 82 supports 'a bracket |30, as best seen in Figure 3, supporting a pair of bracket plates |32 and |34, having pivotwith a piston rod |42 having attached thereto a piston, not shown, mounted within the cylinder |40. The outer end of the piston rod |42 is provided with a bifurcated coupling unit |44 having pivotallyymounted therein a lever |46 pivoted about a fixed pivot |48 mounted on an arm |50 integral with the bracket 82. The end of the lever |46 opposite the coupling unit |44 is provided with a pivot |52 pivotally attached to a link |54 having the opposite end |56 pivotally attached to an arm |53. The arm |58 is non-rotatably attached to the mounting member |22, so that as the arm |58 is oscillated, the mounting member |22 also oscillates.

The cylinder |40 is provided with a pair of uid intake openings or passages |60 and |62, one for eacli' end of the cylinder. .If uid is admitted through the passage |60 into the cylinder, the piston rod |42 will be actuated upwardly, as viewed in Figure 3, to oscillate the lever |46 in a clockwise direction about the pivot |48, to thereby oscillate the mounting member |22 and the parts carried thereby in a clockwise direction, as viewed in Figure 3. If fluid is admitted through the passage |62, the direction of oscillation of the mounting member |22 Will be reversed, or in a counterclockwise direction, as viewed in Figure 3. This pivot may be referred to as the vertical axis, about which the projector is oscillated.

Mode of operation 'the screen. Each of these movements of the projector may be made without in any manner causing other movements. This is made possible by mounting the cylinders and actuating mechanism on the support of the pivot for the parts to be adjusted. The projector may be orientated or oscillated by admitting the fluid through the passage 56 or 58 of the cylinder 54, so as to oscillate the bracket 42, either in a clockwise or a counterclockwise direction, as viewed in Figure 2. As the bracket 42 is oscillated, the arm 80, the bracket 82 and the mounting member |22 are oscillated in unison and thereby the projector |24 is oscillated.

If it is found desirable, the projected picture may be raised or lowered vertically on the screen .by admitting iiuid to the intake passage I|6 or If it is found desirable to shift the picture on Vthe screen either to the left or to the right, this may be accomplished by admitting fluid to the intake openings or passages |60 or |62 of the cylinder |40 respectively. By so doing, the mounting member |22 is oscillated about its pivot, thereby shifting the projector |24 either to the left or right, depending upon which intake opening is supplied with iluid.

The pivots are preferably all aligned so as to intersect at a point near the lens, so that as the projector is oscillated, rotated or orientated the effective distance from a point on the screen to the lens remains substantially constant. By this arrangement the projector remains in focus after once being focused, irrespective of the adjustments of the projector. This is very important.

for the reason that if the pivots do not intersect near the lens or at the lens, adjustments of the projector would throw it out of focus.

Thus it is possible to project upon the screen a picture of an airplane that normally would'be ying toward or away from the observer. This airplane may be raised or lowered on the screen by admitting uid to the proper cylinder, It may be moved to the left or to the right on the screen by admitting fluid to the proper cylinder for so actuating the projector. Or, the plane may be banked to the left or to the right by admitting fluid to the cylinder that orientates the projector or tilts the projector about the axis of the beam of light, thereby orientating the projected view of the airplane upon the screen. These movements may take place simultaneously or in seriatim. Two of the movements are preferably correlated, that is, the movement that orientates Although the preferred embodiment of the del vice h-as been described, it will be understood that within the purview of this invention various changes may be made in the form, details, proportion and arrangement of parts, the combination thereof and mode of operation, which generally stated consist in a device capable of carrying out the objects set forth, as disclosed and dened in the appended claims.

Having thus described my invention, I claim:

1. A mounting assembly for a projector, said mounting assembly including means for oscillating the projector about a horizontal pivot normal to the ray of light used in projecting an image thereby raising or lowering the image upon the screen, means for oscillating the projector about a vertical pivot thereby shifting the image to the right or left, and means for oscillating the projector about a horizontal pivot normal to the first mentioned pivot thereby orientating 'the image upon the screen.

2. A mounting 'assembly for a projector, said mounting assembly including a base, a standard mounted upon the base, a pivotally mounted supporting member mounted for oscillatory movement upon the standard, liuid responsive means mounted upon the standard for actuating said pivotally mounted supporting member, a second pivotally mounted -supporting member mounted for oscillatory movement upon the rst supporting member, fluid responsive means mounted upon the rst supporting member for actuating the second supporting member, and means for interconnecting the projector to the second supporting member, said interconnecting means belng mounted for oscillatory movement with respect to the second supporting member so that the projector may be oscillatedI by oscillating one of the supporting members and it may be oscillated by oscillating said interconnecting means.

3. A mounting Iassembly for a projector, said mounting assembly including a base, a standard mounted upon the base, a pivotally mounted supporting member mounted for oscillatory movement upon the standard, uid responsive means mounted upon the standard for actu-ating said pivotally mounted supporting member, a second pivotally mounted supporting member mounted for oscillatory movement upon the rst supporting member for actuating the second supporting 'memben and a third pivotally mounted supporting member mounted for oscillatory movement upon the second supporting member, fluid responsive means mounted upon the second supporting member for actuating the third supporting member, said third supporting member supporting the projector which may be oscillated by oscillating any one of the supporting members.

4. A mounting assembly for a projector, said mounting assembly including a support, a pivotally mounted supporting member mounted for oscillatory movement upon the support, fluid respcnsive means mounted upon the support for actuating said supporting member, a second pivotally mounted supporting member mounted for oscillatory movement upon the first supporting member, uid responsive means mounted upon the rst supporting member for actuating the second supporting member, and a third pivotally mounted supporting member mounted for oscillatory movement upon the second supporting member, fluid responsive means mounted upon the second supporting member for actuating the third supporting member, said third supporting member supporting the projector which may be cscillated by oscillating any one of the supporting members.

5. A mounting assembly for mounting an object for oscillation in trihedral planes, said mounting assembly including a support, a pivotally mounted supporting member mounted for oscillatory movement in one plane, means for voscillating the pivotally mounted supporting 

